National STEM Day is November 8. Put a sheet of paper across two books and ask, “Would you trust that bridge with ten coins?” Let everybody guess before you reach for the first coin. A spectacular flop gives the next engineer something to work with.
What is National STEM Day?
National STEM Day is November 8. It encourages curiosity about science, technology, engineering, and mathematics; the related STEAM name includes the arts. The celebration works best when children get to try something and change it.
An invitation to explore and invent
MGA Entertainment founded National STEM/STEAM Day in 2015. The American Association of School Librarians describes its aim of encouraging more young people into these fields, including students who have been underrepresented. A simple building challenge can make that invitation tangible: predict, test, notice, and improve. American Association of School Librarians’ history.
A simple way to enjoy the day
Build a paper bridge or compare two ramp designs. Ask “What happened?” before “Did it work?” A collapsed bridge can produce a better discussion than a perfect first attempt, especially when the builder gets another try.
Holiday dates for planning
| Observance | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| National STEM Day | Sunday, November 8, 2026 | Monday, November 8, 2027 | Wednesday, November 8, 2028 | Thursday, November 8, 2029 | Friday, November 8, 2030 |
National STEM Day date reference
Set up a 20-minute bridge lab
Gather two equally tall books, three sheets of the same paper, a ruler and a handful of identical coins. Work on a flat table. Set the books about four inches apart and mark their positions so the gap stays put. Keep the coins with an adult around little ones.
Lay one sheet flat across the gap. Add coins one at a time at the center. Count how many it holds before it touches the table. If it sags to the table before the first coin, record zero. That’s a measurement!
Try the same paper with a different shape
Fold a fresh sheet back and forth like a fan, making roughly half-inch folds. Open it partway and lay it across the same gap, with the ridges running from book to book. Use the same coins, spot and counting rule. The folds give the paper depth, which can make it harder to bend under the load.
Now hand the decision to your engineer. Try narrower folds or a different gap. Change just one thing and record what happens. If you run out of coins, write “held all 12,” or however many you had; you haven’t found the breaking point yet.
In a classroom, give teams a builder, a coin counter and a recorder. Swap jobs for the next trial. End by asking which number surprised them and which design they’d trust with just one more coin.
Free printable activity sheets
The Paper Bridge STEM Lab Sheets set comes with three pages: sketch a paper bridge, load test log and change one thing. Print one lab set per team so each group can keep its own results.